Given X, define an equivalence relation on X by setting x~y if there is a connected subspace of X containing both x and y. The equivalence classes are called yhe components of X.
This is what I learned as definition of components. But I think reflexivity of the equivalence relation is unsure. For every x in X, to satisfy the condition x~x, we should show that there is a connected subspace of X containing x. How can I show this?