Evidence for the existence of God

Where can proof of God's existence be found?
"In an axiom which you apply to your sciences: There is no effect without cause. Seek the cause of everything that is not man-made, and your reason will answer you".
To believe in God it is enough to look at the works of creation. The universe exists. It has a cause. To doubt the existence of God would be to deny that every effect has a cause and to assert that nothingness could have done anything.
What consequence can be drawn from the intuitive feeling of the existence of God, which all men carry within themselves?
"That God exists; for where would that feeling come from if it were not based on something? It is also a consequence of the principle that there is no effect without cause".
Wouldn't the intimate feeling we have of the existence of God be the result of education and the product of acquired ideas?
"If so, why do your savages have that feeling?"
If the feeling of the existence of a supreme being were only the product of a teaching, it would not be universal and would only exist – like the notions of the sciences – in those who had received that teaching.
Could the first cause of the formation of things be found in the intimate properties of matter?
"But in that case, what would be the cause of these properties? A first cause is always necessary".
To attribute the first formation of things to the intimate properties of matter would be to take the effect for the cause, for these properties are also an effect which must have a cause.
What are we to think of the opinion that attributes the first formation to a fortuitous combination of matter, in other words, to chance?
"Another absurdity! What man of good sense would consider the acaso to be an intelligent being? Besides, what is the perhaps? Nothing".
The harmony which regulates the energies of the universe reveals definite combinations and aims, and thus reveals an intelligent power. To ascribe the first formation to the akashos would be nonsense, for the akashos is blind and cannot produce the effects of intelligence. An intelligent a-accident would no longer be an a-accident.
Where, in the first cause, do we see a supreme intelligence superior to all intelligences?
"You have a proverb that says: By the work you know the author. Well then, look at the work and seek out its author. Pride breeds unbelief. The proud man wants nothing above himself, and therefore calls himself a strong spirit.36 Poor being, whom a breath of God can bring down!"
The power of an intelligence is judged by its works. No human being can create what nature produces. Therefore, the first cause is an intelligence superior to mankind. Whatever prodigies are performed by human intelligence, this intelligence also has a cause, and the greater what it performs, the greater will be the first cause. This higher intelligence is the first cause of all things, regardless of the name by which man designates it.