God as the eternal Spirit is still invisible and always will be. This is because the Spirit is like the wind: we can hear it and feel it but we cannot see it (John 3:7). God in His manifestation as man is completely visible. So it all depends on what you mean when you say God. Consider the following verses: John 1:18 says, 'No one has seen God at any time. The only begotten Son, who is in the bosom of the Father, He has declared Him. In John 14:9 the Son says, 'He who has seen Me has seen the Father.' Colossians 1:15 describes the Son as, 'He is the image of the invisible God.' Yet in Matthew 5:8 the Son says, 'Blessed are the pure in heart, for they shall see God.' The only way to put all these verse together so that they make sense is to understand that Spirit is invisible but flesh can be seen, and the flesh is the image or manifestation of the the Spirit.