And endurance (fortitude) develops maturity of character (approved faith and tried integrity). And character [of this sort] produces [the habit of] joyful and confident hope of eternal salvation.
AMP
And patience, experience; and experience, hope:
KJV
They will be like a vine stripped of its unripe grapes, like an olive tree shedding its blossoms.
NIV
He shall fail to bring his grapes to maturity [leaving them to wither unnourished] on the vine and shall cast off blossoms [and fail to bring forth fruit] like the olive tree.
AMP
He shall shake off his unripe grape as the vine, and shall cast off his flower as the olive.
KJV
The seed that fell among thorns stands for those who hear, but as they go on their way they are choked by life's worries, riches and pleasures, and they do not mature.
NIV
And as for what fell among the thorns, these are [the people] who hear, but as they go on their way they are choked and suffocated with the anxieties and cares and riches and pleasures of life, and their fruit does not ripen (come to maturity and perfection).
AMP
And that which fell among thorns are they, which, when they have heard, go forth, and are choked with cares and riches and pleasures of this life, and bring no fruit to perfection.
KJV
But if anyone obeys his word, love for God is truly made complete in them. This is how we know we are in him:
NIV
But he who keeps (treasures) His Word [who bears in mind His precepts, who observes His message in its entirety], truly in him has the love of and for God been perfected (completed, reached maturity). By this we may perceive (know, recognize, and be sure) that we are in Him:
AMP
But whoso keepeth his word, in him verily is the love of God perfected: hereby know we that we are in him.
KJV