The best service you can do is to keep your thoughts on God. Keep God in mind every minute.
Love is the strongest medicine.
I don't want anything. I exist only to serve others.
If you want to see God, kill desires. Desires are in the mind. When you have a desire for something, don't act on it and it will go away. If you desire to drink this cup of tea, don't, and the desire for it will go away.
Every line of the Hanuman Chalisa is a Mahamantra.
Lust, Greed, Anger, Attachment - These are all paths to hell.