We gain strength when: we gain new knowledge; overcome our fears; try something new; engage in creativity; we communicate with nice people; we communicate with people who support us and believe in us; we engage in our body (any physical practices, bath, swimming pool are suitable); free up physical space (remember how different you feel in a renovated room); free up emotional space (remember how you feel differently when you managed to forgive and say goodbye to a person); we say "no" when we want to say "no" and we say "yes" when we want to say "yes"; we begin to do what the heart asks.