(adjective) Having, or capable of exerting power, potency or influence.
"If we desire to secure peace, one of the most powerful instruments of our rising prosperity."
"The simplest acts of kindness are by far more powerful then a thousand heads bowing in prayer."
"Allowing people to have space for self-growth is a powerful form of love."
"He who controls others may be powerful, but he who has mastered himself is mightier still."
"Distrust all in whom the impulse to punish is powerful."
"Habits are powerful but we have the power to create them."
"Nonviolence is a weapon of the strong."
"You are powerful and you are capable of anything you imagine."
"Who is wise? He that learns from everyone. Who is powerful? He that governs his passions. Who is rich? He that is content. Who is that? Nobody."
"You have to feed your mind daily with the good, clean, pure, powerful and positive."