The anchor holds the ship in place because it weighs more than the ship and it latches on to something.
We have this hope as an anchor for the soul…
Hebrews 6:19 NIV
My hope has to weigh more than my soul, my life, anything that could potentially cause my soul to drift away from its bay, to stray from the shore.
My hope has to be secured to something that will keep it in place. What is my hope secured to? God’s unchanging nature & His promise confirmed with an oath. God’s nature embodies truth. He CANNOT lie. So, when He promises, since He is truth, I can be secure in His promises. My hope is latched, anchored to something that cannot move.
…by these two unchangeable things in which it is impossible for God to lie…
Hebrews 6:18
We flee, run to take hold of, grab on to THAT hope. A hope that has no possibility of changing. It is impossible for God’s nature to change (Hebrews 6:18-19). Let my hope weigh more and hold fast to God’s nature and His promises. When things around me start to outweigh my hope, it uproots my anchor. Keep my hope heavy.

Faith is the rock my hope is anchored to and love is the rope, the chain that connects them to me, the ship. Without love I am unattached to faith and hope. That is why love is the greatest.
And now these three remain: faith, hope and love. But the greatest of these is love.
1 Corinthians 13:13 NIV
An anchor is useless if it’s not attached to anything. The anchor will be attached to the seabed, a rock, etc with nothing, no ship to hold in place. The rope, love unites the boat (me) to its anchor. None of the 3 are weak. The rock or whatever in the sea the anchor is attached to has to be strong enough to withstand the pull of the anchor. It drags across the sea floor until something is strong enough to stop it. The anchor is strong enough when released to slow the ship down but only stops completely when secured. The rope has to be sturdy enough to bear the weight of the ship and the anchor pulling it in opposite directions. Without love the other two would be disconnected and in vain.
A solid rock, a heavy hope, a tenacious rope