The only motive I can perceive is my own causeless and timeless happiness. And what is the method?

Happiness is incidental. The true and effective motive is love. You see people suffer and you seek the best way of helping them. The answer is obvious — first put yourself beyond the need of help. Be sure your attitude is of pure goodwill, free of expectation of any kind.

Those who seek mere happiness may end up in sublime indifference, while love will never rest.

As to method, there is only one — you must come to know yourself — both what you appear to be and what you are. Clarity and charity go together — each needs and strengthens the other.