Herbert Weir Smyth, A Greek Grammar for Colleges

““ἀνδρῶν γὰρ σωφρόνων μέν ἐστιν, εἰ μὴ ἀδικοῖντο, ἡσυχάζειν” for it is the part of prudent men to remain quiet if they should not be wronged” T. 1.120, εἴ τι τυγχάνοι κακόν, εἰς ὄμματ᾽ εὔνου φωτὸς ἐμβλέψαι γλυκύ (ἐστιν) if any ill betide, 'tis sweet to look into the face of a loyal friend E. Ion 731, τί δεῖ καλῆς γυναικός, εἰ μὴ τὰ_ς φρένας χρηστὰ_ς ἔχοι; what boots the beauty of a woman if she have not a mind that is chaste? E. fr. 212.

b. The present indicative sometimes has the force of an emphatic future. Thus, πάντ᾽ ἔχεις, εἴ σε τούτων μοῖρ᾽ ἐφίκοιτο καλῶν thou hast all things, should the portion of these honours come to thee Pindar, Isthm. 4 (5). 14. Present and future occur together in Ant. 4. α. 4.

c. Other examples of the present: Hom. I 318, α 414, ε 484, η5 1, θ 138, ξ 56; Hesiod Op. 692 (εἴ κε); Pind. Pyth. 1. 81, 8. 13, Isthm. 2. 33; Bacchylides 5. 187; Hdt. 1.32; S. Ant. 1032, O. T. 249; E. Hec. 786, fr. 212, 253 (v.l.); T. 2.39, 3. 9, 4. 59, 6. 86; X. C. 1.6.43, H. 6. 3. 5, 6. 5. 52, O. 1. 4, 1. 5; P. A. 19e, Cr. 46 b, Pr. 316 c, 329 a, b, L. 927 c; Isocr. 14. 39; D. 18.21, 20. 54, 20. 154, 24. 35; Antiphanes fr. 324.