What do the last 3 verses in Psalm 91 mean, verses 14-16?
Psalm 91:9 Because you have made the LORD, who is my refuge, Even the Most High, your dwelling place, 10 No evil shall befall you, Nor shall any plague come near your dwelling; 11 For He shall give His angels charge over you, To keep you in all your ways. 12 in their hands they shall bear you up, Lest you dash your foot against a stone. 13 You shall tread upon the lion and the cobra, The young lion and the serpent you shall trample underfoot. 14 Because he has set his love upon Me, therefore I will deliver him; I will set him on high, because he has known My name. 15 He shall call upon Me, and I will answer him; I will be with him in trouble; I will deliver him and honor him. 16 With long life I will satisfy him, And show him My salvation.
In context this applies to the Messiah, Jesus Christ as is made clear in Matthew 4:6.
Matthew 4:6 and said to Him, "If You are the Son of God, throw Yourself down. For it is written: ‘He shall give His angels charge over you,’ and, ‘In their hands they shall bear you up, Lest you dash your foot against a stone.’
Psalm 91:14Because he has set his love upon Me, therefore I will deliver him;
Jesus endured crucifixion to show his love for his Father.
John 14:31 But that the world may know that I love the Father, and as the Father gave Me commandment, so I do. Arise, let us go from here.
I will set him on high, because he has known My name.
The name of God encompasses his character and purpose. These Jesus showed to his disciples.
John 17:26 And I have declared to them Your name, and will declare it, that the love with which You loved Me may be in them, and I in them.
After his resurrection all things were given into his hands.
Matthew 28:18 And Jesus came and spoke to them, saying, "All authority has been given to Me in heaven and on earth.
15He shall call upon Me, and I will answer him;
Jesus called upon God and angels were sent to minister unto him.
Luke 22:43 Then an angel appeared to Him from heaven, strengthening Him.
I will be with him in trouble;
John 16:32 Indeed the hour is coming, yes, has now come, that you will be scattered, each to his own, and will leave Me alone. And yet I am not alone, because the Father is with Me.
I will deliver him and honor him.
God raised him from the dead to eternal life
Acts 2:24 Whom God hath raised up, having loosed the pains of death: because it was not possible that he should be holden of it.
1 Peter 3:22 who has gone into heaven and is at the right hand of God, angels and authorities and powers having been made subject to Him.
16 With long life I will satisfy him, And show him My salvation.
Revelation 1:18 I am He who lives, and was dead, and behold, I am alive forevermore. Amen. And I have the keys of Hades and of Death.
I hope you find this helpful.