A.T. Robertson Commentary John 6:21

"They were willing therefore to receive him into the boat: and straightway the boat was at the land whither they were going." — John 6:21 (ASV)

They were willing therefore (ηθελον ουν). Inchoative imperfect, "they began to be willing." This does not contradict Mr 6:51 as Bernard thinks. Both Jesus and Peter climbed into the boat.

Whither they were going (εις ην υπηγον). Progressive imperfect active, "to which land they had been going" (intransitive use of υπαγω, to lead under, to go under or away as in verse 67; 7:33; 12:11; 18:8.