If you describe someone’s attitude as sour grapes, you mean that they say something is worthless or undesirable because they want it themselves but cannot have it.
These accusations have been going on for some time now, but it is just sour grapes.
No one wants to be around someone who always has an attitude of bitterness, otherwise, one that is sour. Someone with a sweet attitude about life usually possesses these characteristics: thoughtful of others, always wants to cheer up people, helps others get through a bad day, is very polite, generous, has an admirable personality, looks for the good in others, and is selfless.
One who has a sweet attitude also has an optimistic outlook about both the present and the future. This individual uses negative experiences to build on something positive. When he has to be stern, it is usually done in the spirit of harmony, love and peace.
A sweet attitude is a reminder of what it says in Galatians 5:22-23 (ESV): “But the fruit of the Spirit is love, joy, peace, patience, kindness, goodness, faithfulness, gentleness, self-control; against such things there is no law.”
However, someone with a sour attitude is just the opposite. He has a spirit of seeking to blame others, is ungrateful, looks for the negative in everything, is never satisfied, lacks confidence, is fearful of trying new things, has feelings of hate for others, usually for no apparent reason, and feels the world revolves around him only. Someone with this type of attitude needs a change.