Faith is something abstract that exist only in the mind where in, is our salvation.
We are not saved by works, works is anything that we do that people can see whether they are bad or good, our salvation does not depend on what we do, but rather, it only depend on Faith in Christ Jesus which was liberally given to us for just being Christians

So, it is hard for atheists to see God because God exist only as faith in our heart of believers, and as a Spirit, ofcourse you can't see spirits.

Romans 10:10 For with the heart man believeth unto righteousness; and with the mouth confession is made unto salvation.

But many Christians today, they want to do something to prove to people that God is in them. They want to perform some miracles,they want to do evangelism, they want to prophesy, they want to be good to others, they want to be religious, etc.

There is nothing bad in doing all these things, but the truth is ,these things do not validate you being a believer, only your faith in Christ do.

So, quite trying to prove God, you don't need to prove anything to anyone as a Christian. just live your life and be yourself, that's all it takes to be a Christian. Whoever really want to see God, the bible is there for him to read.

Happy Sunday

Good