Colossians 2:8-10
Beware lest any man spoil you through philosophy and vain deceit, after the tradition of men, after the rudiments of the world, and not after Christ. For in him dwelleth all the fulness of the Godhead bodily. And ye are complete in him, which is the head of all principality and power:
Romans 1:20
For the invisible things of him from the creation of the world are clearly seen, being understood by the things that are made, even his eternal power and Godhead; so that they are without excuse:
The Anti-Nicene Fathers, Volume 2 - Fathers of the Second Century, The Pastor of Hermas, The Pastor Book 2 - Commandment 10, Chapter 1 - OF GRIEF, AND NOT GRIEVING THE SPIRIT OF GOD WHICH IS IN US
"Those who have never searched for the truth, nor investigated the nature of the Divinity, but have simply believed, when they devote themselves to and become mixed up with business, and wealth, and heathen friendships, and many other actions of this world, do not perceive the parables of Divinity; for their minds are darkened by these actions, and they are corrupted and become dried up. Even as beautiful vines, when they are neglected, are withered up by thorns and divers plants, so men who have believed, and have afterwards fallen away into many of those actions above mentioned, go astray in their minds, and lose all understanding in regard to righteousness; for if they hear of righteousness, their minds are occupied with their business, and they give no heed at all. Those, on the other hand, who have the fear of God, and search after Godhead and truth, and have their hearts turned to the Lord, quickly perceive and understand what is said to them, because they have the fear of the Lord in them. For where the Lord dwells, there is much understanding. Cleave, then, to the Lord, and you will understand and perceive all things."