When does our ambition become insatiable greed?

When does our striving and perseverance blind us, and we are unable to let go? How do we know what is enough?
Whether it is the stock market or a project or a business or a relationship …. everything in life thrives only up to a point. Let’s call it the “life giving point “. Recognising it makes life easy and enjoyable – so say the wise.
What is your way of knowing your ” life giving points” for what matters to you ?