“Go to the village ahead of you, and at once you will ...” (Matthew 21:2-3)

“Go to the village ahead of you, and at once you will find a donkey tied there, with her colt by her. Untie them and bring them to me. If anyone says anything to you, tell him that the Lord needs them, and he will send them right away.” (Matthew 21:2-3)

Jesus is instructing his disciples to go into Jerusalem and get him a donkey on which he could ride through Jerusalem. He also requested that they say that their mission was on behalf of their service to God.

“If anyone says anything to you ...”

While “the Lord” may be construed to be Jesus, this is inconsistent with Jesus’ other activities and statements. Jesus never proclaimed to being the Lord. Jesus proclaimed to be a loving servant (υἱός) of “the Lord” God. He also prayed to the Lord God and taught that we should do God's will:
"For I have come down from heaven not to do my will but to do the will of Him who sent me." (John 6:38)

For whoever does the will of my Father in heaven is my brother and sister and mother.” (Matthew 12:49-50)

"By myself I can do nothing; I judge only as I hear, and my judgment is just, for I seek not to please myself but Him who sent me." (John 5:30)
Thus God was ultimately Jesus' Lord, as God is Lord to every prophet in the Old Testament, and Lord to each of us.

This it would be correct to interpret that Jesus was going to be using the donkey to serve his Lord God; and those he instructed to get the donkey were also serving God by following Jesus' instructions.

Why is this important? It is important because this is how the loving servant of God engages his students in the service of God.

God is a Person

It is also important because the Supreme Being is not some vague force or void. God is a Person. Only a person can have a will, and be served and pleased. A vague force or cloud cannot have a will. A vague force or cloud cannot be pleased with someone's service.

Jesus taught and showed with his life that God is a Person we can love and serve, and care for. God is a lovable, beautiful and compassionate Person. He is the Perfect Person we are continuously looking for. He is the Person who will never abuse us or take us for granted.

In addition, the Supreme Being is the Person we can always count on. He is the Person we are looking for when we expect others to be good. He is the Person we are looking for when we are disappointed in others. He is the Person we are looking for when we are heart-broken by a former girlfriend, boyfriend, or spouse. He is the Person we are looking for when we seek the admiration and respect from others. He is the Person we are looking for when we are lonely.

'Blessed is he who ...'

It is notable to mention also that as Jesus went through the streets of Jerusalem, his students and disciples were shouting:
The crowds that went ahead of him and those that followed shouted, “Hosanna to the Son of David!” “Blessed is he who comes in the name of the Lord!” “Hosanna in the highest heaven!” (Matthew 21:9)

This indicates that the people recognized that one of Jesus’ central missions was to teach the power of the Name of God. Otherwise, why would people be shouting that verse drawn from David's Psalm 118?
Blessed is he who comes in the name of the LORD. (Psalm 118:26)
Jesus also taught the importance of glorifying God's Holy Names:
“This, then, is how you should pray: “ ‘Our Father in heaven, hallowed be your name ... ' " (Matthew 6:9)
And consider this text about Jesus and his disciples:
When they had sung a hymn, they went out to the Mount of Olives. (Matthew 26:30)
So we know from this that Jesus, regularly led his students in singing hymns. And what is a hymn? A hymn is the praising of God and His Holy Names, as exemplified by David's Psalms:
“Rejoice in the LORD, you who are righteous, and praise His Holy Name.” (Psalms 97:12)
“In Him our hearts rejoice, for we trust in His Holy Name.” (Psalms 33:21)