If you have achieved something valuable or significant, there is little reason to pursue lesser goals or things of lesser worth, as it would be unnecessary and possibly wasteful. The quote suggests that once you have found success or a valuable outcome, there's no need to continue searching for smaller or less important rewards.
The phrase encourages appreciating what you already have rather than constantly seeking more or different pursuits. It implies that contentment and recognition of one's achievements are essential, and chasing after lesser aims might distract from the satisfaction of having attained a genuine success.