“You can lead a horticulture, but you can't make her think.”
“You can lead a man to Congress, but you can't make him think.”
“You can lead a horse to water, but you can't make him sing opera.”
“YOU CAN LEAD A HORSE TO WATER, BUT YOU CAN'T MAKE HIM DRINK FROM THE TOILET" ”
“You can lead a horse to water, but you can't make him participate in synchronized diving.”
“If you think you can, you can. If you think you can't, you're right.”