“When Christ was wrestling with temptation in the garden (Matt. 26:37ff.), we see Him seeking comfort among His three disciples. When Paul, in Acts 28:15, saw the brethren coming to meet him, he took courage from the sight and experienced comfort. Loneliness distresses a person who is solitary and deprived of his intimate friends. He can exert himself and struggle against it, but he does not overcome it without great difficulty.
Everything is less burdensome if you have a brother with you; for then the promise applies (Matt. 18:20): ‘Where two or three are gathered in My name, there am I in the midst of them.’ Therefore solitude should be shunned and the companionship of familiar people sought, especially in spiritual perils” (LW 2:335).