Catullus

“ All things are ungrateful, to have acted kindly is not
beneficial at all, on the contrary it tires and it hurts more,
As it is to me, whom no one distresses more seriously nor more painfully,
Than he who holds me as his one and only friend. ”

“ Dēsine dē quōquam quicquam bene velle merērī
aut aliquem fierī posse putāre pium. ”