The very first line sets the tone and mood of the poem making it clear to reader that it is this fall season and both the roads appear to be similar with their leaf-littered physical appearance. The speaker is "sorry" he can't travel both roads, suggesting regret. Because of the impossibility of traveling both roads, the speaker stands there trying to choose which path he's going to take.
The speaker still seems pretty uncertain when he explains that this second path is better. Then the speaker tells us why the path is better – it seems like it hasn't been walked on very much. He really can't seem to make up his mind! Just when he about to announce about which path is better, he changes his mind and admits that maybe they were equal after all.
The paths are covered with leaves, which haven't been turned black by footsteps of the people. He is rationalizing his choice of path by saying he'll come back to the one he missed later. The phrase “way leads on to way" explains how one road can lead to another, and then another therefore he “doubts” if he would ever come back and take another path.
The line “Two roads diverged in a wood, and I”— is a repetition of the first line of the poem which brings the poem to the conclusion. The speaker at the end chooses the path which is less travelled