The Sheep are secure because they are being kept by/in the Power of God through faith unto an inheritance that is being reserved specifically for them. An inheritance prepared for them from the foundation. 1 Pet 1:3-5; Matt 25:34
Are not Jesus's sheep secure in Jesus because they are His sheep?
I heard someone saying His sheep can stray. But the verses in John suggest
His sheep listen and follow Jesus so do not stray. If you stray you probably
do not know Jesus.
It struck me I have witnessed to some who literally were open and loved Jesus
while others seemed along for the ride, and liked the implications but did not
care for the cost or the details.
I see Jesus's words as words of encouragement to those who listen and follow.
I know you, you love me, and I love you, so Amen, I will keep you and protect
you. Praise the Lord.