Like Dissolves Like
What does this saying mean? Well, here's an example: You made toast with butter. As you are looking at your phone you reach down for the toast but instead you accidentally touch the top of the toast getting butter all over your hand. You go to the sink to rinse your hands with water but the butter doesn't seem to want to come off. Why? Butter is made up of things that are non-polar and water is polar. Non-polar and polar repel each other. So, instead of just using water, you decide that maybe a little bit of Dawn will help. You try it and it works perfectly. How? Most of the chemicals that make up Dawn are non-polar.
So, the point is that non-polar solutes dissolve non-polar solvents and polar solutes dissolve polar solvents, thus explaining the saying "Like dissolves like".