Making a difference requires accepting the world as it is, at least if the world includes what is possible as well as what is actual. Politics is commonly defined as the art of the possible, but a somewhat more precise formulation would render it as the art of making the possible actual. This means, in the first place, focusing your efforts on what is, so to speak, actually possible – and desirable.
Preventing an undesirable possibility from becoming actual is also a way of making a difference – one of the more important ones, I’d say. This too is a modally rich affair. As Tancredi Falconeri put it in Giuseppe Tomasi di Lampedusa’s The Leopard (1958), “If we want things to stay as they are, things will have to change.”