Sentence:  'Tis true, the stuff I bring for sale/ Is not so brisk a brew as ale:/ Out of a stem that scored the hand/ I wrung it in a weary land./ But take it: if the smack is sour,/ The better for the embittered hour;/ It should do good to heart and head/ When your soul is in my soul's stead;/ And I will <WSD>friend</WSD> you, if I may,/ In the dark and cloudy day. 
Meaning of the word marked with <WSD> tags:  To act as a friend to, to befriend; to be friendly to, to help.