Shared ground
These verses are love poetry. The man speaks to the woman as a “locked garden,” a “locked spring,” and a “sealed fountain,” then fills out the picture with fruit and rare aromas, and finally calls her “a well of living waters” with streams that flow. The plain point of the images is that she is both protected (not open to everyone) and abundantly desirable (rich, life-giving, and delightful).
The text’s claims are metaphorical: it does not directly describe an actual garden inventory, but uses garden language to communicate intimacy, value, and exclusivity. In the immediate context, this imagery leads toward mutual enjoyment in the next verse (4:16), so the tone is praise rather than suspicion.
Where interpretation differs
What the “locked/sealed” language refers to. Some read it mainly as sexual exclusivity (her intimacy is reserved for the rightful beloved). Others take it more broadly as personal privacy and guarded access to her whole self (reputation, affection, time, and body). Both readings stay close to the metaphor, but they emphasize different parts of what “access” means.
What “living waters” highlights. Some hear “living waters” mainly as freshness and vitality (moving water, not stagnant). Others also hear overtones of purity and cleansing, or simply heightened sensual pleasure through the water imagery. The text itself clearly leans toward vitality and abundance; the extra nuances are inferred.
Why the disagreement exists
The poem gives vivid images without specifying one-to-one meanings. “Garden,” “spring,” and “sealed fountain” naturally suggest both intimacy and protection, and “living waters” naturally suggests both freshness and desirability. Because the language is evocative and not explained, readers differ on how narrowly to map the symbols.
What this passage clearly contributes
It contributes a strong picture of delighted admiration that joins two ideas: (1) the beloved is not publicly available (“locked,” “sealed”), and (2) within rightful access there is overflowing richness (fruit, spices, “a fountain of gardens,” and “living waters”). It also contributes the theme that desire can be expressed with honor: guardedness is portrayed as part of her worth, and abundance is portrayed as something celebrated rather than taken.