I think that atheism can easily lead to depression. If there is no God, there is no purpose in life, we are like a particle of dust. Once we die, it's over, nothing to hope for, nothing to wish for, nothing. The universe is infinite, chaotic and cold; time is as big as the universe, therefore a person and their existence are too insignificant. Life would be like a period in the middle of a book. Love, hope and intelligence would have no transcendence at all, people would be disposable because who cares about a teeny-tiny existence like many, many others in the middle of infinity. All these thoughts would make me feel empty and depressed really.