naturam expellas furca, tamen usque recurret.

You may drive out Nature with a pitchfork, yet she still will hurry back.

Notes

You must take the basic nature of something into account. - Horace, Epistles, Book I, epistle iv, line 24.

Words

furca – a fork, fork, narrow pass, pitchfork
usque – all the way, even, up to
tamen – but, for all that, however, nevertheless, nothwithstanding, still, yet
natura – nature
expello – banish, expel, force out, to drive out, to eject