We can view wise effort as taking a canoe to the water and making the effort to put it in. Once the canoe is in the water, it floats on its own – we don’t need to make it float. Our effort is to launch the canoe. Once in the water, we have paddles and can direct the canoe, but we don’t have to try and make it float. –
~ Lisa Ernst

Stay right at that point of balance where you’re not pushing it too hard and not being too lazy or lax — just the right amount of interest, the right amount of attention and intention to keep things going — so that the breath can have a chance to heal the wounds in the body, soothe the mind, and bring both the body and the mind to the stages of practice where the concentration gets stronger and your insights grow sharper, more subtle. It’s important that the groundwork be done. Just keep on doing the work. Things will develop.

~ Thanissaro Bhikkhu

According to Stephen Batchelor, Enthusiasm is a better translation than Effort. He offers the 8th century poet Shantideva’s views on Wise Enthusiasm as finding joy in what is helpful and having a passion for living a mindful life, a moving force like wind that fills our sails and moves us.