"Be tough in times of ease, tender in hard times."
When things are hard, often we are more reliant on God, leaning on Him in our hardship. When things become easier we tend to be more self-reliant and independent. It is important then to keep our promises, and not forget the lessons we have learned - or soon we may find ourselves having to learn them a second time. When outward circumstances are not checking us it is important to find appropriate disciplines to stop us from becoming spiritually lazy or unfit.
But when we are weary and circumstances press upon us, Jesus said to allow Him to be yoked besides, shouldering much of the weight. We should also look to ease one another's burdens - leaning on each other and becoming much stronger together than we could ever be alone.