Jesus said this to His disciples:
A little while longer and the world will see Me no more, but you will see Me. (Jn 14:19)
Judas (not Iscariot) noticed what He said but did not understand how He would accomplish it. So he asked:
Lord, how is it that You will manifest Yourself to us, and not to the world? (Jn 14:22)
And Jesus answered this way:
If anyone loves Me, he will keep My word; and My Father will love him, and We will come to him and make Our home with him... the Helper, the Holy Spirit, whom the Father will send in My name, He will teach you all things, and bring to your remembrance all things that I said to you. (Jn 14:23–26)
The world does not see Jesus, but we do. We see Him in our hearts. And we must know that we see the Father, Son, and Holy Spirit as One when we look in there and observe Him. And Him being there is the reason we know Him.
And it is quite obvious that seeing things with our eyes, hearing things with our ears, and feeling things with our hearts is not the way to know the things of God because they are revealed to us by His Spirit...
9 But as it is written:
“Eye has not seen, nor ear heard,
Nor have entered into the heart of man
The things which God has prepared for those who love Him.”
10 But God has revealed them to us through His Spirit. For the Spirit searches all things, yes, the deep things of God. 11 For what man knows the things of a man except the spirit of the man which is in him? Even so no one knows the things of God except the Spirit of God. 12 Now we have received, not the spirit of the world, but the Spirit who is from God, that we might know the things that have been freely given to us by God. (1 Co 2:9–12)