Grief is always a complicated process and its effects are different for each individual. Consoling someone in grief is also a delicate situation and saying “I’m sorry for your loss” doesn’t really help that much to alleviate the person’s pain.
There are reasons for not saying this phrase to a grieving person and some suggestions on what to say instead.
Some of us have issues with co-workers or team mates at work and this takes away our enthusiasm for going to work. You may have a work mate that stresses you out and you don’t know what to do with them anymore. If you are a leader in your work, issues related to team members not getting along well are even more problematic and can really be a headache.