There are many lessons to be learned from EACH day of the Passion Week.
I will only use one for each day.

Faith that does not produce fruit WITHERS!

Matt. 21:18-22
18 Now in the morning as he returned into the city, he hungered.
19 And when he saw a fig tree in the way, he came to it, and found
nothing thereon, but leaves only, and said unto it, Let no fruit grow
on thee henceforward for ever. And presently the fig tree withered away.
20 And when the disciples saw it, they marvelled, saying, How soon
is the fig tree withered away!
21 Jesus answered and said unto them, Verily I say unto you, If ye
have faith, and doubt not, ye shall not only do this which is done to
the fig tree, but also if ye shall say unto this mountain, Be thou removed,
and be thou cast into the sea; it shall be done.
22 And all things, whatsoever ye shall ask in prayer, believing,
ye shall receive.

Light from the Word.

Perhaps one might also read Mark 11:13-20.

Matthew is brief in his account of this incident and does not explain
there were two days in the event of the fig tree.
He only says "presently the fig tree withered away."
Mark explains that on one morning Jesus made the statement about
the tree and the next morning they noted it was withered.

In Judaea, fig trees often put on leaves as early as March, and by
April the figs are ripe.
Mark says, "He found nothing but leaves."
In other words the tree exhibited it should have fruit, but was VOID!

Jesus took this occasion to teach a lesson of faith.
Let us remember, in this example, that faith belongs to those who have
surrendered to God. (See Ephesians 2:8-9).
Faith is a gift of God given to those who surrender to Christ.
It is the action of God's Holy Spirit working in the believer.

Jesus was saying, "If you HAVE faith, and act upon it without wavering, then.."
you can do these other things.
Now someone might say, "I, in true faith, have said to the mountain
'be thou removed,' and it has not budged!"
Perhaps they don't realize that faith provides a SHOVEL!

Faith that produces no fruit will WITHER, because the person
"hath no root in themselves." (Mark 4:17)
The true faith will expose a path through which to overcome obstacles to that faith!

And the object of the lesson is NOT that we might have power to move mountains
into the sea.
The object of the lesson is to PRAY BELIEVING!
In such prayer, God will show a way!

Is your faith producing the fruit of prayer and Bible study so that you might grow stronger?

Love ya!
Bro. Bruce