The Bible tells us about Heaven and speaks of it as a real place; a place to which all who love Jesus will someday be. We will know our friends and family in heaven. There we will see Jesus. Many people, before they take that last breath into the fragile tent of their earthly lungs, speak of angels being present in the room. Some that have gone as far as the "gates of heaven" only to come back have spoken of what they've seen and experienced. When my friends Nina and Mark Haines lost their mentally ill son they both had a vision regarding him. To his father Jon said, "It's beautiful here." There are several books currently on the market about this topic; among the best -- The Boy Who Came Back From Heaven.
People who have preceded us in death, are now, part of the great cloud of witnesses that scripture speaks of surrounding us in life. Therefore, since we have so great a cloud of witnesses surrounding us, let us also lay aside every encumbrance and the sin which so easily entangles us, and let us run with endurance the race that is set before us (Hebrews 12: 1).
Though He knows we will be sad and has designed the grieving process, Jesus tells us not to grieve as the unsaved do who have no hope. Read 1st Thessalonians 3: 13-18; and 4: 1-11.
And looking at them Jesus said to them, "With people this is impossible, but with God all things are possible" (Mathew 19: 26). Also: Mark 20:27; Luke 18: 27
How do we access this power? We pray and we do not give up in prayer. We trust the many promises of God regarding prayer. God said that all His promises were "yes" and when we lift up these promises to God - that He loves us and will respond to our prayers - what follows is the triumphant "amen!" Read 2nd Corinthians 1: 18-22. About prayer, Jesus said: Truly, truly, I say to you he who believes in Me, the works that I do, he will do also; and greater works than these he will do; because I go the Father. Whatever you ask in My name, that will I do, so that the Father may be glorified in the Son. If you ask Me anything in My name, I will do it. If you love Me, you will keep My commandments (John 14: 12-15).