Someone loses a heap of weight, someone else begins a new exercise regime, another goes into rehab for drug and alcohol abuse. These are all good changes to make in your life but they don't guarantee a spiritual change that comes with salvation.
Don't get me wrong, there will be obvious change. The things I've mentioned above may be a part of that, symptoms if you like, but the change is not the individual actions so much as the attitude that leads to continual change for the better in the spiritual person's life.
A percentage of people who pick up a self-help book will change as I described above. The Christian difference is that it is not self-help, it is God-help. He initiates it, He sustains it, He makes it happen and go on happening until you die or Jesus returns.
The obvious change will always include love. And not the selfish love that is prevalent in single adults who sacrifice all of the great blessings of God to shape themselves after the latest self-help guru. Spiritual love will embrace God's blessings (which often come as challenges) and will sacrifice selfishness to be changed by the Spirit.
Look for it and you will see it. If it's not where you look, it is doubtful that the Spirit (and salvation) is present...