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Renaissance Humanism - worldhistory.org
Renaissance Humanism was an intellectual movement typified by a revived interest in the classical world and studies which focused not on religion but on what it is to be human.

Renaissance Humanism - worldhistory.org
Humanists believed in the importance of an education in classical literature and the promotion of civic virtue, that is, realizing a person's full potential both for their own good and for the good of the society in which they live.

Ac 10:34b [KJV]
“God is no respecter of persons”

The Effects of Humanism
Man is always trying to gain some advantage against God’s sovereignty, even if only slightly (at first). For example, he is predisposed to syncretism (mixing religions and secular schools of thought). This is catastrophic to God’s salvific plan.

Pr 16:25
There is a way that seems right to a man, but its end is the way to death.

Free Will
The only Person who actually has absolute free will is God. All creatures, being slaves (whether of righteousness or unrighteousness – ala Ro 6), are under bondage, including their will, as it is a function of their nature.

Desiderius Erasmus Roterodamus (aka “Erasmus”) – Wikipedia.com
(1466 –1536): a Dutch philosopher and Catholic theologian who is considered one of the greatest scholars of the northern Renaissance. As a Catholic priest, he was an important figure in classical scholarship who wrote in a pure Latin style. Among humanists he enjoyed the sobriquet "Prince of the Humanists", and has been called "the crowning glory of the Christian humanists".

Desiderius Erasmus Roterodamus (aka “Erasmus”) – Wikipedia.com
Using humanist techniques for working on texts, he prepared important new Latin and Greek editions of the New Testament, which raised questions that would be influential in the Protestant Reformation and Catholic Counter-Reformation. He also wrote On Free Will…

“Free Will” WRONGLY Defined by Humanist, Desiderius Erasmus
"Moreover I consider Free-will in this light: that it is a power in the human will, by which, a man may apply himself to those things which lead unto eternal salvation, or turn away from the same."

The Bondage of the Will – Martin Luther
"Free-will" cannot be applied to anyone but to God only. You may, perhaps, rightly assign to man some kind of will, but to assign unto him "Free-will" in divine things, is going too far…But you cannot call him Free, who is a servant acting under the power of the Lord.

The Bondage of the Will – Martin Luther
The Scripture, however, sets forth such a man, who is not only bound, miserable, captive, sick, and dead, but who, by the operation of his lord, Satan, to his other miseries, adds that of blindness: so that he believes he is free, happy, at liberty, powerful, whole, and alive. For Satan well knows that if men knew their own misery he could retain no one of them in his kingdom.

Maintaining Godly Perspective
We aren’t qualified to evaluate God’s salvific plan; we can only accept it. Erasmus made the error of evaluating God’s salvific plan through a humanistic lens, which resulted in perverted doctrines that were widely accepted and still haunt Christendom today!

The Bondage of the Will – Martin Luther
THIS, therefore, is also essentially necessary and wholesome for Christians to know: That God foreknows nothing by contingency, but that He foresees, purposes, and does all things according to His immutable, eternal, and infallible will. By this thunderbolt, "Free-will" is thrown prostrate, and utterly dashed to pieces.

The Bondage of the Will – Martin Luther
"Free-will" cannot be applied to anyone but to God only. You may, perhaps, rightly assign to man some kind of will, but to assign unto him "Free-will" in divine things, is going too far…But you cannot call him Free, who is a servant acting under the power of the Lord.

The Bondage of the Will – Martin Luther
The Scripture, however, sets forth such a man, who is not only bound, miserable, captive, sick, and dead, but who, by the operation of his lord, Satan, to his other miseries, adds that of blindness: so that he believes he is free, happy, at liberty, powerful, whole, and alive. For Satan well knows that if men knew their own misery he could retain no one of them in his kingdom.

Balance Statement
Historically, some of the most well-intentioned theologians have gone too far with their doctrinal stances. Where faith is called for, they have inserted human viewpoint. Where the flesh has demanded answers, man has provided without God’s consent.

Ecc 12:13-14
The end of the matter; all has been heard. Fear God and keep his commandments, for this is the whole duty of man. For God will bring every deed into judgment, with every secret thing, whether good or evil.

Martin Luther King, Jr.
Others doctrines such as a supernatural plan of salvation, the Trinity, the substitutionary theory of the atonement, and the second coming of Christ are all quite prominent in fundamentalist thinking. Such are the views of the fundamentalist and they reveal that he is opposed to theological adaptation to social and cultural change. He sees a progressive scientific age as a retrogressive spiritual age. Amid change all around he is willing to preserve certain ancient ideas even though they are contrary to science.

What’s the Problem?
Man is forever trying to usurp God’s power and authority, more succinctly, His sovereignty! This is tantamount to saying the human flesh wishes for independence from God.