The ability to love and to work is one definition of maturity. Emotional and spiritual maturity is not necessarily linked to physical age.
People can and do grow throughout life.
Mature people develop the wisdom to know what they can and cannot control. They understand that they need determined self-discipline to achieve goals. They appreciate their responsibilities as much as their rights. Without this experience, one is often overly inhibited or unable to take the necessary steps to further moral growth. For You , Dorothy Finkelhor writes about a student who indicated in a self-evaluation quiz hat he had a violent temper.