I had dream last night in which I saw my late father. He held my hands and mouthed some words. It was so vivid that I was sure it was real. Does this mean anything? Should I be worried?
Dreams are what our mind sees when we don't control it. They can be caused by many different factors. How we should react to a dream will be determined by the type of dream we saw.
Some dreams are the result of external stimuli. If you sleep with a fan blowing on your face, you may dream of flying a helicopter. Other dreams have biological causes. If you go to bed thirsty, you may dream of yourself hiking through a parched desert searching for water. These dreams are not terribly significant. The message may simply be to take a drink of water, or move the fan away from your head.
Other dreams are the continuation of the thoughts of the day. A problem you ponder during the day can sometimes be solved in dreams at night. Often they are an expression of unwanted thoughts - whatever we try not to think about is exactly what pops up in our dreams. That's why we often dream of our darkest secrets being revealed, or deepest phobias being faced. These dreams are a window into our subconscious, a peek into the thoughts our mind is occupied with when we let it run loose. They should not be seen as portents of what lies in the future, but rather exposés of what lurks in our mind.
But then there is another type of dream, a dream that seems to border on the prophetic. Unlike the confused and nonsensical dreams we typically see, these are characterised by the vividness you describe in your dream of your father. While most dreams are better ignored, these ones can be hard to dismiss as ramblings of the idle mind. They are too powerful, too awesome to just forget.
The Kabbalists explain that while we sleep, our soul leaves the body and ascends to its heavenly source to replenish its energy. While a residue of the soul remains with the body to keep it alive, the main portion of the soul travels to higher places. In this disembodied state, the soul is free to experience visions and encounters that are usually off limits to beings of this world. This includes the possibility of meeting other disembodied souls, like the souls of loved ones who have passed away. It is their opportunity to convey a message to those whom they have left behind.
It is possible that your dream comes under this last category. How you should respond to it depends on the mood of the dream. Did your father seem disturbed or troubled in any way? Did you wake up feeling uncomfortable or sad? Then perhaps he needs something from you. Was he mourned appropriately? Have memorial prayers like Kaddish and Yizkor been said for him? Is his grave attended to, and anniversary of his passing (Yohrzeit) observed? If not, he may be coming to you, his daughter, to ask you to rectify these things, to ensure that his memory is honoured and his soul given the assistance it needs to find rest.
On the other hand, his demeanour in the dream may have been one of peace and contentment. Did you wake up feeling comfort and warmth? If so, then he is just paying you a visit. He came to say hello, express his love for you, and remind you that he is there for you, proud of you, and will always be your father.
There is no cause for worry. You father has given you either a mission, or a gift.
On Friday evening, the Menorah should be lit before Shabbos candles are lit, no earlier than 6:40pm and no later than 7:51pm, ensuring that there is enough oil or wax to last until half an hour after nightfall which is 8:39pm.
This Saturday night, the Menorah must be lit after Shabbos has ended, no earlier than 8:53pm.