Describe these lines in "Piano" by Lawrence.
In spite of myself, the insidious mastery of song
Betrays me back, till the heart of me weeps to belong
To the old Sunday evenings at home, with winter outside
And hymns in the cosy parlour, the tinkling piano our guide.
As with any poetic interpretation, the answer you will receive will always be subjective. A poem rarely means the same thing any two people. Poetry is meant to move, to bring about critical thought, or to evoke feelings.
That being said, the lines mentioned, from Lawrence's poem "The Piano", when used out of context of the poem, are spoken as a remembrance. The speaker admits that he does not wish to be drawn back to a certain time in the past, but the music he hears has such an affect upon him that he cannot control it.
The speaker is swept back to a time where music was a commonplace in his life. With the music came a sense of comfort and happiness- all signified by the playing of a piano.