Good things ... God things.
Just one character, one byte of data, perhaps even an easily made typo ... but the difference between what can lead us away from Christ and His purposes and what can lead us with Christ and His purposes.
In Mark chapter 8 Jesus starts spelling out the plan A, which is the suffering and dying version. Peter thinks he knows better, he wants Jesus to surge forward as the successful hero-leader, and so tries to correct Jesus.
The response is stark, and perhaps one we need to be hit with ourselves from time to time: 'You do not have in mind the concerns of God, but merely human concerns'.
So many things may seem right, may have logic, legitimacy, and would most other times almost certainly be correct. Yet they reflect human concerns rather than God's own heart.
Can we tell the difference? That needs an ongoing closeness to Jesus, a desire to have our minds continually re-orientated to His concerns, to His plans, balck to plan A.