I truly hope that one day, you guys that don't believe get to have an experience with someone who has passed on.
That's the only way you'll see the light literally.
As you get older and those you love start to pass on, is usually when it will happen.
From a scientific perspective, you have to at least acknowledge, that everything everywhere is merely a vibration of atoms. Both physically and spiritually, we are just electromagnetic vibrations.
Our bodies are more complex than we can perceive with our five senses, as science connects metaphysics in declaring that the physical body is not a continuous solid, but is basically composed of particles and waves of energies. Matter in general (and our bodies in particular) is therefore essentially a construction of our senses: it is really the interaction of patterns of energy, vibrating at interwoven frequencies and intensities.
From this vibratory matrix emerges an energy field that surrounds and interpenetrates our physical forms. This field has long been perceived by sensitive people, though generally scoffed at by skeptics.
"Do you remember how electrical currents and 'unseen waves' were laughed at? The knowledge about man is still in its infancy."
Albert Einstein