to turn one's back on; to be uninterested in
to push someone (towards); to encourage someone
back-to-back; facing in opposite directions; two sides of the same coin; inextricably linked (esp. with something dangerous or undesirable); on bad terms; at odds
to walk behind someone; to follow in someone's footsteps
to let one's actions do the talking; to lead by example; to walk the talk
to teach by example; to teach by showing; (lit.) to teach with one's back
children grow up watching their parents
(imaginary) switch on a baby's back that makes it cry as soon as it is put to bed; (lit.) back switch