'As the apple tree among the trees of the wood, so is my beloved among the sons. I sat down under his shadow with great delight, and his fruit was sweet to my taste.' Song of Songs 2:3
To sit down in His shadow means you must sit very close to Christ. It means that you truly learn to have fellowship with Him. Gone are the early days of excitement and blessing. Now you come much closer, to listen to His words and share His inner thoughts. To do His will and to please Him becomes the most important thing in life. It's there that His fruit becomes sweet to our taste; the words He says to us, the cross He gives us to bear, the quiet stillness of His Presence.
We cannot taste that fruit when we are in a hurry, or keen to do our own thing. We must sit in His shadow, simply surrender to His will and wait for that miracle that happens when the Holy Spirit reveals the delights of His Presence to us.
'I know that He must be sweet Himself, when His cross is so sweet.' Samuel Rutherford