Personal growth comes from a balance of comfort and discomfort.
Comfort is important because we are not striving to grow just to make ourselves miserable. But the process of growing can be painful because we have to look at the parts of our lives where we don't feel successful. It is important to make time to feel good, to focus on the things in life we enjoy.
However, when we retreat to that nest of comfort we are not growing. To grow we need to move beyond where we are comfortable and challenge ourselves.
This is the balance we need to seek, the balance between the moments of rest and the moments of work.