Can you give an example.
I dont quite understand because christians are actually given revelation by the Holy Spirit to understand scripture. The Holy Spirit is unseen, and one must have faith in what is UNSEEN.
All the evidence supplied by God...the holy spirit is a gift given to us. He supplies us. The physical evidence that Jesus Christ came in the flesh, is to us available in scripture which is an eye witness account written down, unless you are advocating archeological evidence, in which case scientists and skeptics need to go visit Israel to see for themselves the empty tomb, in Jerusalem, go to the dead sea, go to Bethlehem, Nazareth, the temple mount where the holy of holies was, mt sinai, go beneath the red sea to see evidence of the eyptians being crushed by water, see the mount of olives, etc.
His chosen people, the israelites, the ones who speak hebrew, the ones who had the oracles of God, and preserve them in scriptures we can see today. Bearing witness...it is the changed lives of Christians and their testimonies that is the best witness. Its the healing we receive in our bodies, and often this manifestation is physical, that bears witness..the deaf hearing, the blind seeing, the lame walking.
What else can we look to, we can see the stars as many as sand on the sea shore, or the heavens when we look up, proclaiming the glory of God. We can see pictured of the planet earth from space and see we are the only planet that has water and see the evidence that God DID send a flood and if one looks at our planet earth from space more than half, maybe 2/3rds of its covered with water, especially the pacific ocean. We can see that the planet is lopsided and spins on an axis, suggesting a great disruption that took place, and how the land has been moved around as if the land had been divided.
We can measure the earths temperature over time and see the globe is indeed warming up, as Jesus shown in prophecy that there will be a judgement day where there the elements will melt with fervent heat.
We can see land that has been destroyed by humans as evidence that humans are wicked and sinful, and need God. When we find rest in gardens and by fresh water we can see evidence of Gods original creation was good, the way He intended it to be in Eden.
The Bible uses the physical world to teach us about God and spiritual things. That is one way the heavens can declare the glory of the Lord.
Look at the way nature is used in conjunction with the acts of God. Look at Proverbs. Look at Psalms. It is the purpose of creation to teach us about God. We should not 'go to class' thinking we already know everything and contradict the teacher when the teacher attempts to correct misconceptions.
In Romans 1:20, Paul decries the fact that mankind, has not learned from the things that He made. Note that he does not say that they have not heeded the scriptures, but that they have not learned from the world around them. This applies to both believers and non-believers.
In 1 Thessalonians 5:19-21, Paul admonishes us to follow the Spirit (V19) and not ignore scripture (v20). The way we are to do this is to test or prove all things, especially the scriptures (or, rather our interpretation of scripture) (V21). One way to do this is to compare what we think the Bible is saying with the world He made. When we find an appearance of conflict we shout examine the problem from both sides. Sometimes we can find a resolution, sometimes not, but even when conflict remains we should not doubt either the Word of God, nor the world He made.
If we are not willing to employ physical creation in this way, the heavens may be declaring the Glory of God, but we are covering our ears with our hands and refusing to learn.