In the course of time one does not feel even the existence of God. After attaining enlightenment one sees that gods and deities are all Maya.
The creation itself is full of griefs. How can one understand joy if there is no sorrow? And how can everyone be happy at the same time?
No one can suffer for all time. No one will spend all his days on this earth in suffering. Every action brings its own result, and one gets one's opportunities accordingly.
The conjunction of the day and the night is the most auspicious time for calling on God. The mind remains pure at this time.