“I am sure they are in a better place”
Although “I am sure” this statement comes from a good place, unfortunately you can’t truthfully tell the griever what exact place his or her loved one is right now. I recommend staying away from this overused and unintentionally insensitive phrase. I would love to know what happens beyond life, but the truth is, we all have our own beliefs (and for some, this uncertainty causes them the most pain and anxiety). Also, please keep in mind that it is even possible that the one you lost does not believe that anything happens after life. When it comes down to it, the place that we want our loved ones to be is next to us, experiencing life right beside us. There is no “better place” than that.
What to say instead? “I am here, and I will sit here with you even when you don’t know what you need.