Your face is calm and breezy, and no one knows how tightly your teeth are clenched. You walk with the wind, and no one knows that you still have bruises on your knees from a fall.
A person's talent is like the water in a sponge, it will never flow out without being squeezed by external force. After the outflow, the sponge can absorb a new source.
When you give your heart and soul to someone, that person will often betray you. Because you have already paid for it completely, so there is no novelty and use value.