Home > Lessons / Let Go / Life / Quotes The greatest source of happiness is the ability to be grateful at all times. 0 shares Share Tweet Pin The greatest source of happiness is the ability to be grateful at all times. Post Views: 388 Related posts: If you have the ability to love, love yourself first. One sincere apology is worth a thousand fake compliments. The energy of the mind is the essence of life. Your happiness can not be taken by the others if it is not given by the others. Take care of your attitude and life will line up. Perhaps I am stronger than I think.