The principle of give and take is the principle of diplomacy - give one and take ten
Never run after you own hat - others will be delighted to do it; why spoil their fun?
In statesmanship get formalities right, never mind about the moralities.
A banker is somebody who lends you an umbrella & takes it away as soon as it starts raining.
The catfish is Plenty good enough fish for anyone
Between us, we cover all knowledge; he knows all that can be known and I know the rest.