This verse, John 14:3, is a central and comforting promise from Jesus to his disciples (and, by extension, to all believers). Let's break down its meaning:

"If I go and prepare a place for you...": Jesus is referring to his impending departure, which includes his death, resurrection, and ascension to heaven. "Preparing a place" suggests that heaven is not merely a spiritual realm but a real place, a prepared dwelling for those who believe in him. It implies a future home where believers will dwell with God.

"...I will come again...": This refers to Jesus's second coming. Christians hold various beliefs about how this will happen (literal physical return vs. a more spiritual manifestation), but the core promise is that Jesus will return.

"...and will receive you to myself...": This speaks of the ultimate reunion between Jesus and his followers. "Receive you to myself" suggests a personal, intimate, and loving connection. It's a promise of being brought into Jesus' presence.

"...that where I am, you may be there also.": This is the core of the promise and the desired outcome. The goal is for believers to be with Jesus in his presence, sharing in his glory and eternal life. It suggests that heaven will be a place of fellowship with Jesus, a place where we will share in his joy and presence.

In summary, the verse conveys these key ideas:

Hope: It offers hope for a future home in heaven prepared by Jesus.
Promise: It promises Jesus's return and reunion with believers.
Fellowship: It emphasizes the desire for believers to be with Jesus eternally.
Comfort: It provides comfort in the face of death and separation from loved ones.
Purpose: It suggests that our earthly lives should be lived in anticipation of this future fellowship with Jesus.

The verse is a cornerstone of Christian eschatology (the study of end times) and offers believers assurance of a blessed future in God's presence.