This is a beautiful quote. In few words it gives us how to live our life so that we will be content and happy.
Surrendering to what is means, living and enjoying the present. After all the present or the now is what we have in hand. If we don't live and enjoy the present, in no time it will be past.
Let go of what was-means past is past. We have to forget, forgive all that made us unhappy or sad and march on. If not we will also loose our present with out enjoying it.
Have faith in what will be means hope-hoping for a better future. With out hope there is no tomorrow. Those who believe in God can have faith in Him and that He will always provide us with the best.
In short the best way to live is, let bygones be bygones, live and enjoy the present and hope for a better future. This way we can lead a very happy and content life.
A small message conveying a strong and useful message. Don't you think so?