While they have great affection one for another, there is a constant undertone of worry in their lives.

Each is too critical of the other.

They worry about trifles.

Each is losing daily the sweetness of sympathetic and joyous comradeship because they do not see eye to eye in all things.
Where a mutual criticism of one's work is agreed upon, and is mutually acceptable and unirritating, there is no objection to it.

Rather should it be a source of congratulation that each is so desirous of improving that criticism is welcomed.