The Lord is wanting to get our attention. He is wanting us to see what He is doing, and that is to be in a place of rest. “He has raised us up together, and made us sit together in the heavenly places in Christ Jesus,..” (Eph 2:4-6). Being seated is a place of rest, a place of position before provision.
Jesus walked on the water towards His disciples, He is manifesting Himself to His people afresh. It wasn’t until they willingly received Him into the boat that they were where they needed to go.