This life is a test from God. This life is like a school. That is the reason God is hiding. Because if God showed himself to all humans then this life would not have been a test anymore.
"No evidence of God" is because of this a bad argument against God.
I believe in God without evidence because God is hiding on purpose.
This is my opinion.
Any thoughts?
God is both hidden and manifest. His full manifestation that no can deny will be on the day of judgment. That is the day of truth. Till then, he isn't overly explicit in manifesting himself. However, hide too much and no one can know he exists.
Imam Zainal Abideen (a) says "And I know you do not veil yourself from creation except their actions are for other then You".
On the day of judgment while God and his truth is manifest, disbelievers can't see his glory and beauty, because that takes vision from love.
Love in this world is the most powerful tool and if you see God by it, you will not be harmed by the day of judgment.
The Quran is a proof of God and Mohammad (s) and his successors (a). However, miracles as in the physical type, are not longer present while much of Quran is on reasoning why such miracles are proofs.
Since Imam Mahdi (a) became hidden, God's hiddenness has amplified and time has made miracles disbelieved in or their historical nature is doubted and they no longer are evidence to the public.
God always show miracles and signs to those who are sure and turn to him often, and so there is a Guide (Imam Mahdi (a)) who can show such signs and prove the truth beyond doubt, but he is not in public.
So while before you can go to a figure like Moses (a) or Jesus (a) and they do miracles, now, you have to search and turn to God, and perhaps God will guide by the hands of the Imam (A) of time and show you miracles.
If you act for God - even the highest unseen signs where you ascend to the heavens and see lights of God in form of the holy household of the reminder of the time, will open up.
If you seek the world, and don't search out God and his signs, you will forget not only God but your own soul, and become oblivious in darkness from the truth.
The only reason miracles are not in the open now, is because their performers and such signs were opposed and denied by former generations.
Had they been accepted, they would still be in the open.