I believe Jesus made it pretty clear that living a life of self-sacrificial love and service to others is what following Him actually
is. There are plenty of verses like the one you mentioned throughout the Gospels.
A new commandment I give to you, that you love one another; as I have loved you, that you also love one another. By this all will know that you are My disciples, if you have love for one another. John 13: 34-35
In regards to this verse:
Jesus answered, "I am the way and the truth and the life. No one comes to the Father except through me. John 14:6
If we attempt to understand this verse without our spiritual lens, and try to tie it to western ideas of "objective/literal" truth, Jesus comes across as being somewhat of an egomaniac.
But if we understand Jesus as being the very embodiment of truth, indeed, Love itself, we realize that when
we have love toward others, we align ourselves with Him, and therefore become One with the God(truth), just like Him.
I think John understood that Jesus'
way of Compassion, sacrifice, service and grace is not
a way, or
some way, or
part of the way, but
the Way. And anyone who lives in this way is a follower of Christ.
If we look at it like this, these statements come out not as "It's either my way or the highway", but rather, "It doesn't matter how you
describe it, there is only one Truth... not one for me and none for you, but you and I, after all our sinning against each other, all our wandering and suffering, are ultimately connected to this One source of all Life and Love."
or something...
Also, I consider myself "Gnostic",(even though I don't place an awful lot of value on labels) but someone who claims to "know", and doesn't manifest this inner knowledge outwardly through Love, probably doesn't really "know" to begin with.