Nothing you’re doing has been wasted. Every time you show love, you are sowing these seeds. But sometimes we think that we have to convince people, we have to tell them what they’re doing wrong, point out all their faults, make sure they really feel guilty.
No, the Paramatma, Lord in the heart, is the one that convinces. It’s not our job to change or convince them. Krishna does that from within the heart. Our job is just to keep sowing these seeds, showing unconditional love, and at the right time they will come to life.