Symbols are the language of feeling, and as such it is not expected that everyone will perceive them the same. There is room for private interpretation related to feeling, not teaching, assuming that it is positive and constructive. Consider the two extremes . Literal and Symbolic both have their place in understanding the will of God. Modern day Christians are neglecting the symbolic meaning within the scriptures.
Truth can and often is locked up or hidden in a symbol.
If interpretations were confined exclusively to what is given in the scriptures, symbols would be virtually worthless because, more often than not, the scriptures give no explanation of them. Symbolism requires one to prayerfully consider the esoteric part of Christianity. Christ taught the apostles separately at times because some other apostles may not understand properly. Things we don't know are considered secret, others may have heard it, but if I have not then it remains a secret. The refusal to see or read beyond the literal rendering of a particular verse is denying the spirit.