To the old Sunday evenings at home, with winter outside And hymns in the cosy parlour, the tinkling piano our guide.
Sunday - religious connotations and a day of rest.
home - connotes family, protection, security, warmth
winter outside - protection
it suggests this is the emotion that he currently longs for (warmth)
hymns - songs (musical quality)
cosy - adj. = family/warmth
tinkling - reference to the tingling piano, a soft/gentle onomatopoeia