Mental and emotional grown-ups share common traits: 

• Be a lifelong learner. The most valuable education doesn’t occur in the classroom.Forgive yourself and others.
• Be forgiving and open to let go off hurts.
• Be open-minded, flexible and see other sides.
• Face fear and overcome it. It’s okay to be scared and do something with it. Overcoming fear does not mean not feeling fear.
• Take responsibility for your own life, your choices, behaviors, actions, or mistakes and take ownership of who you are.Know yourself, what you think and how you feel.
• Enjoy your own company and don not feel lonely.
• Grow in a process. Becoming a mature adult is a continual process and people grow by small achievements.
• Learn to live with pain. Life can be painful; your body feels pain and emotions are painful. Rather than avoiding pain face it.
• Pain in life helps building wisdom, strength and skills.
• Be hard-working. Showing initiative and work hard for whatever you dream about, take one step a time to reach what you desire.
• Be a good behavioral self-manager. Temptations can be invitations that destroy your life.
• Be a good partner. Listen your partner, express yourself, be empathetic and show respect and care.

What, exactly, does to be a mature adult mean ? Does age make people grown-ups or does it involve more?