In good company your thoughts run, in solitude your thought is still; it goes deeper and makes for itself a deeper groove, delves. Delve meansa 'dig with a spade'; it means hard work. In talk your mind can be stretched, widened, exhilarated to heights but it cannot be deepened; you have to deepen it yourself. It needs sturdiness. You will be lonely, you will be depressed; you must expect it; if you were training your body it would ache and be tired. It is worth it. There is a Hindu proverb which says: 'You only grow when you are alone'.
Rumer Godden, Thus far and no further
isolation, lonliness, solitude