Не гоняй лошадь к воде, если ей пить не хочется

You cannot make a man follow your advice if he is un willing

Cf: A man can be led but he can't be driven (Am.). One man can lead a horse to water, but ten men can't make him drink (Am.). One man may lead a horse to the river (the water), but twenty cannot make him drink (Br.). You can lead a horse to water, but you can't make him drink (Am.). You can take (may lead) a horse to the water, but you cannot make him drink (Br.). You may lead a mule to water, but you can't make him drink (Am.)