That David was the Lord's appointed arm,
To meet this bulk of dirt, this giant fear
Brandishing out of the loathly camps of evil.
And before Saul could answer, he put down
The sword, and said, "I love him. Let him go."

....

But the words, I love him, were not for his father Saul,
Hardly Jonathan knowing he spake them out.
But as he looked on David love was there,
Waking from that in David that he himself
A little was, and always greatly shaping
Himself towards, so that his name was spoken
Famously in Saul's kingdom. It was courage,
The clean heart, undivided in its doing,
The purpose that, being bodied in the brain,
Thenceforth knew every trickling argument
That fell from tongues of persuading circumstance,
As lures of evil ever threatening life,
That Jonathan loved above all enterprise.
He knew, or the rarer man within him knew,
That once your yea in holy meditation
Had shaped itself in the perfect syllable,
Thenceforth no nay from any other tongue
Or wise or passionate or masterful,
Could be listened to without the shame of sin
Corrupting all your constancy for ever.
He knew the curse of good betraying good,
Till both in bleak irresolution fall.