Kindness effects more than severity.
From the fable of The North Wind and the Sun:
The North Wind and the Sun had a quarrel about which of them was the stronger. While they were disputing with much heat and bluster, a Traveler passed along the road wrapped in a cloak. “Let us agree,” said the Sun, “that he is the stronger who can strip that Traveler of his cloak.” “Very well,” growled the North Wind, and at once sent a cold, howling blast against the Traveler. With the first gust of wind the ends of the cloak whipped about the Traveler’s body. But he immediately wrapped it closely around him, and the harder the Wind blew, the tighter he held it to him. The North Wind tore angrily at the cloak, but all his efforts were in vain. Then the Sun began to shine. At first his beams were gentle, and in the pleasant warmth after the bitter cold of the North Wind, the Traveler unfastened his cloak and let it hang loosely from his shoulders. The Sun’s rays grew warmer and warmer. The man took off his cap and mopped his brow. At last he became so heated that he pulled off his cloak, and, to escape the blazing sunshine, threw himself down in the welcome shade of a tree by the roadside. (Aesop For Children)
The Wind and the Sun were disputing which was the stronger. Suddenly they saw a traveller coming down the road, and the Sun said: “I see a way to decide our dispute. Whichever of us can cause that traveller to take off his cloak shall be regarded as the stronger. You begin.” So the Sun retired behind a cloud, and the Wind began to blow as hard as it could upon the traveller. But the harder he blew the more closely did the traveller wrap his cloak round him, till at last the Wind had to give up in despair. Then the Sun came out and shone in all his glory upon the traveller, who soon found it too hot to walk with his cloak on. (Eliot/Jacobs Version)
The Wind and the Sun had a bet,
The Wayfarer’s cloak which should get;
Blew the Wind … the cloak clung;
Shone the Sun … the cloak flung
Showed the Sun had the best of it yet.