(A) It is God's immense love for us that means no force or power can separate us from the love of God. Our love can be seem to be feeble, or to fluctuate (if we consider love to be an emotion, and measure it according to our feelings.) However, The Bible is clear that we show love for God by willingly obeying him, as Jesus said:
"If a man love me, he will keep my words: and my Father will love him,
and we will come unto him, and make our abode with him... He that hath
my commandments, and keepeth them, he it is that loveth me: and he
that loveth me shall be loved by my Father, and I will love him, and
will manifest myself to him." John 14:21,23 A.V.
That is the sense in which (A) applies. It is all about abiding in the love of God and Christ.
"Yea, I have loved thee with an everlasting love; therefore with
loving kindness have I drawn thee." Jeremiah 31:3 A.V.
The love of God is the highest form of love there can be - principled love that always seeks the benefit of, and the best for the beloved, irrespective of whether they deserve that or not. It is a form of love that shows that principle in action towards those who hate, and do not love. Christians are called to show that kind of love both to those they love, and to those who hate them. There will be different emotions felt in doing that, but that highest form of love is not dependent on our emotions.
(B) Some Christians are more separated from the love [of] God (i.e. they love God less than others) - is the claim of the O.P. Well, from a human point of view that may appear to be the case, but if we love God less than we ought, that does not have God acting in a "tit for tat" way, as (A) above shows.
This means that the first part of (B) is just plain wrong, but the bit in brackets needs to be looked at. Yes - there seem to be some Christians who exude love for God whilst others seem lukewarm, by comparison. However, there's great danger in going by appearances, just as there is when going by feelings.
But there is no Calvinist view of Christians with different levels of loving God, as the main question asks. The Reformed theology books I looked at for this answer say nothing about up-and-down 'levels' of our love for God; they focus on God's unfailing and undeserved love for us! "God is love" is the basis of Reformed / Calvinistic theology on this.
In the summer of 1939, Reformed preacher Dr. Martin Lloyd-Jones gave an address at an international conference of students. A now-elderly Reformed preacher wrote about this in a recent article saying:
"At one point he was talking about the place of feelings in the
Christian life. He told the students not to focus on their feelings,
but instead to lose themselves 'in the glorious objectivity of the New
Testament'. If they did that, he said, their 'subjective states would
soon take care of themselves'." Evangelical Times newspaper, Nov.
2024, p.19
That article was headed, "At boiling point by the Spirit", and it went on to say,
"You don't get the kettle to boil by studying the phenomenon of
boiling. You simply turn the heat up. In practice this means thinking
about the great facts of the gospel - thinking, thinking, and thinking
about them until you are overcome with the wonder of it. As you
contemplate the beauty of God, his eternal love for you, the
incarnation and life and death and resurrection of his Son... it all
begins to grip you, to move you, to thrill you, to subdue you. At last
you are lost in wonder, love and praise...
...let me quote something from Alexander Whyte: 'Thinking enough,
meditating enough, musing enough on Christ will do it. Yes, if you
will, you can think, and read, and pray yourself into the possession
of a heart as hot as Paul's heart. For the same Holy Spirit... is
given to you also'." (Ibid.)
The closest I can get to a 'theology' of Christians loving God is in the Bible where it says, "And thou shalt love the Lord thy God with all thine heart, and with all thy soul, and with all thy might. And these words, which I command thee this day, shall be in thine heart." Deuteronomy 6:5-6 A.V. also as quoted by Jesus in Luke 10:27. And I have to ask, Do any of us love God to that high level?
