We can't know ahead of time what our full contribution will be. We can't plan it out, given we don't know what will happen.
Our contribution gets revealed to us over time, and only if we keep showing up. If we stop showing up, which we are likely to do when things get challenging at a new level, we stop making a difference. In order to give what we came here to give, we must keep showing up even when it is uncomfortable and easier not to.
When we are committed to the long game and willing to do the uncomfortable work of continuing to show up no matter what, we learn that our response is our power, not our ability to control. When we show up again and again and respond from love, we discover what we really have to give.