[SusanUSA]

Faith-Complete confidence in a person or plan, etc

Athiests are confident in the fact that THEY have it right. It takes alot of faith in oneself to be able to say there is/was no higher power, now or ever, involved in our universe.

[BMCDA]

I see no evidence that suggests the existence of a higher power, so why should I have faith in the nonexistence of this entity.
OTH I suppose you have a lot of faith yourself to be able to say that Sorumalchik who inhabits M104 does not exist.
Everyone can make up a concept he believes in and claim that someone who does not believe in the same concept needs a lot of faith to do so.