Sri Sri Ravi Shankar:
What is it that you lack? Recognize this first. Because of this lack you feel sad. When you feel sad and helpless, then you pray. Offer your limitations, instead of only offering money in places of worship. The Divine is ready to accept all your weaknesses or limitations.
That Divinity which is complete, resides in you. The Divine is eternal, omniscient and omnipotent. Knowing that you are a part on that Divinity, how can you feel limited or incomplete?
Know that you are complete with the help of knowledge, devotion and rightful actions.
Even if you do not know, have faith that you are complete. You do not have to achieve it.
There is air around us. We have to know it or believe it. But we don't have to achieve it because it is already there! Similarly, without the Divine, we do not exist.
How is the Divine? What does He do? These are meaningless questions.
The Divine is there. The Divine is my very own. I am a part of the Divine. Know this.
It is easier to start with the feeling that the Divine is your very own and in time you will know that you are part of the Divine.